8609e27a58
This Pull Request adds OpImageWrite as defined in section 3.52.10. (Image Instructions). The tests in `mlir/test/Target/SPIRV/image-ops.mlir` are also updated (and extended with the new op), so they now pass validation with `spirv-val` after serialization into SPIR-V. The test was missing `ImageQuery` capability and entry points. For entry points dummy `main` functions were added.